Make library universal to allow running from v8 engines or in-browser tests

[ngbrown]

When trying to use this library from vitest in-browser, it errors with "process is not defined". Using native fetch would allow this to run everywhere.

[dvag-gloeckner-daniel]

Fixed in scope of #6. Axios makes this transparent to the user so this library can now be used in Node or in the browser.

[ihsw]

@ngbrown this is fixed now, thank you @dvag-gloeckner-daniel